Power-press.



P. R. HAHNEMANN.

POWER PRESS. APPLICATION FILED JAN. 5. 1910.

Patented oci. 11,1910.

3 SHEETS-SHEET l.

P. R. HAHNEMANN.

POWER PRESS.

AIPPLIGATION FILED JANS. 1910. u

, lPatented Oct. 11, 1910.

3 SHEBTS-SHEBT 2.

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provided with the UNITED sTAimsi-agnnr carton.. vv f PAUL R. HAHNEMANN,OF MOUNT VERNON, NEW YORK, ASSINOR T0 MAX AMS MACHINE CO., OF MOUNTVERNON, NEW YORK, A CORPORATION OF NEW YORK.

POWER-PRESS.

Specification of Letters Patent. Patented Oct, 11, 1910.

Application filed January 5. 1910. Serial No. 536,507.

T o all whom, tit-may concern.' l

Be it known that LPAULR. Hannan-xxx, a subject of the Emperor ofGermany, residing at Mount Vernon, New York, in the county ofWestchester and State of New York, have invented certain new and usefulImprovements in Power-Presses, of which the following is aspecification, reference being had. therein to the accompanying drawing.4

My invention relates to improvements in power presses, more particularlyof the toggie draw press type and'has special reference to an improvedmeans for holding the work in position while being operated upon.

In the accompanying drawings I have illustrated in Figure 1 a verticalelevation of a press embodying an application of my invention. Fig. 2 isa cross section on the line 2-2 of Fig. 1 looking from left to right.Fig. 3 is a plan view of a slide inember, and Fig. 4 a section on theline 4 4 of Fig. 8. Fig. 5 is a diagrammatic illustration of theposition of the connecting links or rods when the holding means areelevated, and Fig. 6 is another diagrammatic illustration of the samewhen' the holding means have descended upon the blank while the same is.being drawn. l l

7 is theusual crank shaft of a draw press itman 8 connected to theplunger or inner side 20 in which may be mounted the usual-draw punchsuch 21.

Upon the side of the frame 9 of the press is provided guide-ways 1()andll in which may be mounted the slide member 12 shown moreparticularly in Figs. 3 and 4. rl`he crank shaft 7 is also provided witha crank or eccentric 13 upon which is mounted the lever 22, the otherend of said "lever being mounted within the slide member 12 as shown, sothat when the pitman is nearly at the limit of its stroke, the slide isat the limit of its downward stroke.

141 and 15 are rocker shafts suitably mounted upon the frameworl shownand provided with cranks upon which are mounted the connecting linkssuch as 1G and 17. From the rocker ,shaft 1+i a crank 18 1nojects intothe groove 19 of the slide member 12 and the same is true of the shaft-15, the general arrangement being seen to advantage in Fig. 2. Theresult vis that as thc slide member 12 is elevated by the rotation ofthe crank or eccentric 13, the

n s ab t of the pressy crank 18 of the rocker shaft 14 and a similarcrank onthe rocker shaft 15, are faused to slide within the curved slotsof the slide member thereby separating in following said slots. Thisseparation of the cranks of the rocker shafts 1-1 and 15 causes saidshafts to rotate and depress the connecting links attached to the crossheads Q7. and 2S adjustably secured to the outer slides 23 and Let whichfirmly holds the blank in position while the draw punch mounted in theplunger operated by the pitman descends and operates upon the work. Uponcontinuing the rotation of the main shaft 7, the slide member descendsallowing the cranks engaging the slots thereof to slide upwardly',within the same, again assuming the position shown in Fig. 5 in whichposition the work is released and may be shifted. The connecting links16 and 17 may of course be adjustably connected to the outer slides 23and 24- as by the screws 25 and QG.

25J-is the bed of the machine in which the die is set and over which theblank is fed.

From this arrangement it will be seen that an intermittent motion isprovided for the outer slide or holder for the blank and' all theadvantages of the toggle press are obtained withoutthe use of the togglelinks usually employed. the blank being held securely and not wrinklingduring the descent of the punch. v

Various modifications may be made without departing from the spirit ofthe invention as set forth in the claims.

Having described my invention, what I claim as new, and desire to secureby Let-ters Patent, is:

1. ln a draw press. the combination with the framework of thc main crankshaft car- .rying a pitman and punch, and a rocker shaft carryingconnecting links and a blank holder, a slide mcmbcr provided withcurvcdslots, cranks upon said rocker shaft engag` ing said slots and othercranks thereupon being' adapted to operate said blank holder, andnieans'in combination therewith whereby said blank holder binds theblank in ad- Vance of operation upon said blank by said punch.

2. In a draw press. the combination with the framework of the main crankshaft carrying a pitman and punch, and rockcr'slnlfts carryingrespectively connecting links, cross heads and a blank holder, a slidemember SRO 3. In a draw press, the combination with irovided with guideways, meansin coml rocker shafts engaging said slots, other ination withsaid rocker shafts for engaging said guide Ways and other means incombination therewith for operating said blank holder, and means forvbinding the' blank by said blank holder in advance of operating uponsaid blank by said punch.

holder, means in combination with said main crank shaft forreciprocating said slide member, and means for securing said blank bysaid blank holder before said punch operates upon the same.

In testimony whereof I aix my signature in presence of two witnesses.

PAUL R. HAHNEMANN.

Witnesses:

THOMAS A. HILL,

:LOUISE ENDERLE.

the framework of the main crank shaft 'car-` rying'a pitrnan and punch,and rocker shafts carrying respectively connecting links, cross Y headsand ablank holder, a slide member provided with curved slots, cranksupon said i cranks thereupon for operating the blank 15'`

